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Monday, 29 January 2018

Top 120 Highway Engineering Question

1. Select the correct statement.
a) More the value of group index, less thickness of pavement will be required.
b) More the value of CBR, greater thickness of pavement will be required.
c) Minimum and maximum values of group index can be 0 and 20 respectively.
d) all of the above
Ans: c

2. If the group index value of subgrade is between 5 and 9, then the subgrade is treated as
a) good
b) fair
c) poor
d) very poor
Ans: c

3. Tyre pressure influences the
a) total depth of pavement
b) quality of surface course
c) both the above
d) none of the above
Ans: b

19. In the penetration macadam construction, the bitumen is
a) sprayed after the aggregates are spread and compacted
b) premixed with aggregates and then spread
c) sprayed before the aggregates are spread and compacted
d) none of the above
Ans: a

20. When the bituminous surfacing is done on already existing black top road or over existing
cement concrete road, the type of treatment to be given is
a) seal coat
b) tack coat
c) prime coat
d) spray of emulsion
Ans: b

22. Select the correct statement.
a) Nagpur road plan formula take into account the towns with very large population.
b) Nagpur road plan has a target road length of 32 km per 100 square km.
c) Second 20-year plan has provided 1600 km of expressways out of the proposed National
highway.
d) Second 20-year plan allowed deduction of length of railway track in the area while calculating
the length of roads.
Ans: c

24. The shape of the camber, best suited for cement concrete pavements, is
a) straight line
b) parabolic
c) elliptical
d) combination of straight and parabolic
Ans: a

25. For water bound macadam roads in localities of heavy rainfall, the recommended value of
camber is
a) 1 in 30
b) 1 in 36
c) 1 in 48
d) 1 in 60
Ans: b

26. The stopping sight distance depends upon
a) total reaction time of driver
b) speed of vehicle
c) efficiency of brakes
d) all of the above
Ans: d

27. When the path travelled along the road surface is more than the circumferential movement of
the wheels due to rotation, then it results in
a) slipping
b) skidding
c) turning
d) revolving
Ans: b

28. Coefficient of friction is less when the pavement surface is
a) rough
b) dry
c) smooth and dry
d) smooth and wet
Ans: d

29. The shoulder provided along the road edge should be
a) rougher than the traffic lanes
b) smoother than the traffic lanes
c) of same colour as that of the pavement
d) of very low load bearing capacity
Ans: a

30. Camber in the road is provided for
a) effective drainage
b) counteracting the centrifugal force
c) having proper sight distance
d) none of the above
Ans: a

31. Compared to a level surface, on a descending gradient the stopping sight distance is
a) less
b) more
c) same
d) dependent on the speed
Ans: b

32. On a single lane road with two way traffic, the minimum stopping sight distance is equal to
a) stopping distance
b) two times the stopping distance
c) half the stopping distance
d) three times the stopping distance
Ans: b

33. The desirable length of overtaking zone as per IRC recommendation is equal to
a) overtaking sight distance
b) two times the overtaking sight distance
c) three times the overtaking sight distance
d) five times the overtaking sight distance
Ans: d

35. Reaction time of a driver
a) increases with increase in speed
b) decreases with increase in speed
c) is same for all speeds
d) none of the above
Ans: b

36. If the stopping distance is 60 meters, then the minimum stopping sight distance for two lane,
two way traffic is
a) 30m
b) 60m
c) 120m
d) 180m
Ans: b

37. The effect of grade on safe overtaking sight distance is
a) to increase it on descending grades and to decrease it on ascending grades
b) to decrease it on descending grades and to increase it on ascending grades
c) to increase it on both descending and ascending grades
d) to decrease it on both descending and ascending grades
Ans: c

39. The terrain may be classified as rolling terrain if the cross slope of land is
a) upto 10%
b) between 10% and 25%
c) between 25% and 60%
d) more than 60%
Ans: b

40. If b is the wheel track of a vehicle and h is the height of centre of gravity above road surface,
then to avoid overturning and lateral skidding on a horizontal curve, the centrifugal ratio should
always be
a) less than b/2h and greater than co-efficient of lateral friction
b) less than b/2h and also less than co-efficient of lateral friction
c) greater than b/2h and less than co-efficient of lateral friction
d) greater than b/2h and also greater than coefficient of lateral friction
Ans: b

54. Softening point of bitumen to be used for read construction at a place where maximum
temperature is 40° C should be
a) less-than 40°C
b) greater than 40°C
c) equal to 40°C
d) none of the above
Ans: b

59. Flexible pavement distribute the wheel load
a) directly to subgrade
b) through structural action
c) through a set of layers to the subgrade
d) none of the above
Ans: c

60. The number of repetitions, which the pavement thickness designed for a given wheel load
should be able to support
during the life of pavement is
a) 1000
b) 10000
c) 100000
d) 1000000
Ans: d

61. Group index method of design of flexible pavement is
a) a theoretical method
b) an empirical method based on physical properties of subgrade soil
c) an empirical method based on strength characteristics of subgrade soil
d) a semi empirical method
Ans: b

62. As per IRC recommendations, the maximum limit of super elevation for mixed traffic in plain
terrain is
a) 1 in 15
b) 1 in 12.5
c) 1 in 10
d) equal to camber
Ans: a

64. On a horizontal curve if the pavement is kept horizontal across the alignment, then the
pressure on the outer wheels will be
a) more than the pressure on inner wheels
b) less than the pressure on inner wheels
c) equal to the pressure on inner wheels
d) zero
Ans: a

65. For a constant value of coefficient of lateral friction, the value of required super-elevation
increases with
a) increase in both speed and radius of curve
b) decrease in both speed and radius of curve
c) increase in speed and with decrease in radius of curve
d) decrease in speed and with increase in radius of curve
Ans: d

68. The attainment of super elevation by rotation of pavement about the inner edge of the
pavement
a) is preferable in steep terrain
b) results in balancing the earthwork
c) avoids the drainage problem in flat terrain
d) does not change the vertical alignment of road
Ans: c

70. In case of hill roads, the extra widening is generally provided
a) equally on inner and outer sides of the curve
b) fully on the inner side of the curve
c) fully on the outer side of the curve
d) one-fourth on inner side and three-fourth on outer side of the curve
Ans: b

71. The transition curve used in the horizontal alignment of highways as per IRC
recommendations is
a) spiral
b) lemniscate
c) cubic parabola
d) any of the above
Ans: a

72. For design, that length of transition curve should be taken which is
a) based on allowable rate of change of centrifugal acceleration
b) based on rate of change of super elevation
c) higher of (a) and (b)
d) smaller of (a) and (b)
Ans: c

75. If ruling gradient is I in 20 and there is also a horizontal curve of radius 76 m, then the
compensated grade should be
a) 3 %
b) 4%
c) 5 %
d) 6%
Ans: b

76. The camber of road should be approximately equal to
a) longitudinal gradient
b) two times the longitudinal gradient
c) three times the longitudinal gradient
d) half the longitudinal gradient
Ans: d

79. In case of summit curves, the deviation angle will be maximum when
a) an ascending gradient meets with another ascending gradient
b) an ascending gradient meets with a descending gradient
c) a descending gradient meets with another descending gradient
d) an ascending gradient meets with a level surface
Ans: b

80. If the design speed is V kmph and deviation angle is N radians, then the total length of a
valley curve in meters is given by the expression
a) 0.38 N V3/2
b) 0.38 (NV3)"2
c) 3.8 NV"2
d) 3.8 (NV3)"2
Ans: b

81. If an ascending gradient of 1 in 50 meets a descending gradient of 1 in 50, the length of
summit curve for a stopping sight distance of 80 m will be
a) zero
b) 64m
c) 80m
d) 60m
Ans: d

85. Select the correct statement.
a) Traffic volume should always be more than traffic capacity.
b) Traffic capacity should always be more than traffic volume.
c) Spot speed is the average speed of a vehicle at a specified section.
d) 85th percentile speed is more than 98th percentile speed.
Ans: b

89. Which of the following methods is preferred for collecting origin and destination data for a
small area like a mass business center or a large intersection ?
a) road side interview method
b) license plate method
c) return postcard method
d) home interview method
Ans: b

91. With increase in speed of the traffic stream, the minimum spacing of vehicles
a) increases
b) decreases
c) first decreases and then increases after reaching a minimum value at optimum speed
d) first increases and then decreases after reaching a maximum value at optimum speed
Ans: a

92. Which of the following is known as design capacity ?
a) basic capacity
b) theoretical capacity
c) possible capacity
d) practical capacity
Ans: a

93. If the average center to center spacing of vehicles is 20 meters, then the basic
capacity of a traffic lane at a speed of 50 kmph is
a) 2500 vehicles per day
b) 2000 vehicles per hour
c) 2500 vehicles per hour
d) 1000 vehicles per hour
Ans: c

94. With increase in speed of the traffic stream, the maximum capacity of the lane
a) increases
b) decreases
c) first increases and then decreases after reaching a maximum value at optimum speed
d) first decreases and then increases after reaching a minimum value at optimum speed
Ans: c

96. If the stopping distance and average length of a vehicle are 18 m and 6 m respectively, then
the theoretical maxi¬mum capacity of a traffic lane at a speed of 10 m/sec is
a) 1500 vehicles per hour
b) 2000 vehicles per hour
c) 2500 vehicles per hour
d) 3000 vehicles per hour
Ans: a

104. The most efficient traffic signal system is
a) simultaneous system
b) alternate system
c) flexible progressive system
d) simple progressive system
Ans: c

105. The provision of traffic signals at intersections
a) reduces right angled and rear end collisions
b) increases right angled and rear end collisions
c) reduces right angled collisions but may increase rear end collisions
d) reduces rear end collisions but may increase right angled collisions
Ans: c

106. Select the incorrect statement.
a) Stop or red time of a signal is the sum of go and clearance intervals for the cross flow.
b) Go or green time of a signal is the sum of stop and clearance intervals for the cross flow.
c) Clearance time is generally 3 to 5 seconds.
d) The cycle length is normally 40 to 60 seconds for two phase signals.
Ans: b

107. Centre line markings are used
a) to designate traffic lanes
b) in roadways meant for two way traffic
c) to indicate that overtaking is not permitted
d) to designate proper lateral placement of vehicles before turning to different directions
Ans: b

109. The entrance and exit curves of a rotary have
a) equal radii and equal widths of pavement
b) equal radii but pavement width is more at entrance than at exit curve
c) equal pavement widths but radius is more at entrance curve than at exit curve
d) different radii and different widths of pavement
Ans: d

110. When two equally important roads cross roughly at right angles, the suitable shape of central
island is
a) circular
b) elliptical
c) tangent
d) turbine
Ans: a

111. The maximum number of vehicles beyond which the rotary may not function efficiently is
a) 500 vehicles per hour
b) 500 vehicles per day
c) 5000 vehicles per hour
d) 5000 vehicles per day
Ans: c

112. A traffic rotary is justified where
a) number of intersecting roads is between 4 and 7
b) space is limited and costly
c) when traffic volume is less than 500 vehicles per hour
d) when traffic volume is more than 5000 vehicles per hour
Ans: a

113. When a number of roads are meeting at a point and only one of the roads is important, then
the suitable shape of
rotary is
a) circular
b) tangent
c) elliptical
d) turbine
Ans: b

117. The most economical lighting layout which is suitable for narrow roads is
a) single side lighting
b) staggered system
c) central lighting system
d) none of the above
Ans: a

118. The direct interchange ramp involves
a) diverging to the right side and merging from left
b) diverging to the left side and merging from right
c) diverging to the right side and merging from right
d) diverging to the left side and merging from left
Ans: c